Do you think one day is enough for IOA and US ?
Just back --we took the Mears shuttle with two preteen kids on Wed Jan 26from Port Orleans FrenchQuarter.
When I called for our pick up time, our options were 7:25 or 8:25am. I chose 7:25. We stopped at 1 other Disney resort and one none Disney (Alamo I think?). We only had a total of 10 people in our shuttle --ours was a van.
Because we had to wait about 10 mintues at the Alamo hotel for the pickup guests to showup (slightly annoying) and stop to drop people at Seaworld first, we got to Universal gate at about 8:20 which was fine though. When I was getting our park tickets thru Will call( I asked attendent for help when a ticket was stuck), we realized our tickets had a promotional early entry so we were allowed in with the resort guests and went right in instead of waiting until 9:am opening. Nice surprise--not sure why they didn't alert me by email when I purchased??
One day/two parks was plenty for us. The early entry helped us get the Harry Potter ride in first thing but even by opening time it was only 20 minute wait.
It WAS a rainy/cloudy start to the day though that helped slow the crowds and then cleared to sun which brought in the people later. We don't do HULK or the other big rocket ride though but did pretty much everything else we were interested in. Hit Spiderman, all HarryPotter, Simpsons twice, ET twice, Men in Black twice,... This was a low crowd time of year, nothing like the two hour waits for HP I read about just weeks ago.
The shuttle pick up was there a few minutes early and left a few mintues early for us since he had all of us ( just our party and the another couple). No other stops on the way back.
A good experience. Not sure it was worth the $477 plus food money(!!!) to leave Disney but it had to be done to experience Harry Potter...